Type-writing machine.



E. L. PFUNDBR. T YPE WRTING MACHINE. APPLmA-TION Hmm am. 1, wma` atented NW10. 1908.

' exceeding a predetermined limit of speed.

mesh with the gear, so e.K to cause the brake `John C. hleLaughlin, in Which a centrifuriage is released from its letter-spacing deimprovements is to avoid the necessity of is' an enlarged detail showing two clutch cierren salaires rnfrnni mision EMIL L. PFUNDER, OF HARTFORD, CONNECTICUT, ASSIGNOR TO UNDERWOOD TYPEWRITER COMPANY, OF NEW YORK, Y., A CORPORATION OF NEW JERSEY.

TYPE-WBTN G- MACHINE.

'Specification oi Letters Patent.

Patented nov. 1o, isos.

Appcation lled Aprl 1, 1908. Serial No. 424,699.

To all whom 'may concern:

Be it known that I, EMIL L. PFUNDER, a citizen oi the United States, residing in lartfordin the county of Hertford and Siate of Connecticut, have invented certain new and useful Improvements in Typefwriting Machines, of which the following is s specification. y

This invention relates to typewritin and tabulating machines, and particular y to means for braking or controlling the speed of the carriage when the same is released from its letterspacing mechanism. y

This invention is in the nature of an improve-ment upon the construction shown in the pending application No. lifll. of'

gully operated broke is illustrated in connection with thecarriage oi the typewriter', to be operated automatically when the carvices, thereby preventing the carriage from in said application, :i brake-revolving pinion is shown normally out ot nuf'l with a. driving `pear whichis connected o the carriage; and the ta h'ulator which releases the car ri: is also caused to more the pinion into to be operated by Jche rele. ed carriage.

Une of the principal fll sets r1" my present moving the pinion into mesh with the gear :it each -release of the carriage; and to this end l mount the pinion permanently in engagei'uent with the gear, and provide a clutch between the pinion and the centrifugal braking arms; this clutch 1.o bo opr erated by the same' denon'iinaliou key (or other key) which releases the carrie Other fea-turcs and advantages will hereinciter appear. A

in the accompanying drawings, liipjure l `embers separated Figi. 2 is :i sectional pla-n taken through the brake-barrel or ruse, and showing .the weights in nori'uul positions. Fig. 3 is a plan, and Fig. 1l un oud elevation of a cross-arm which carries tlul pivoted Weight-arms. ,a sectional elevation showing' the interior of the brake drum, and also illustrating the connection between the brake-pinion and the carriage! gear. Fig. 6 is a sectional elevution of the braking mechanism. Fig. 7 is a diagrammatic elevation of the tahulating mechanism, including a. denomination stop key and means whereby it releases llie'carriage from the control of its escapeinent devices. Fig. 8 is ay sectional, plan teken at e lower point than Fig. 2. Fig. 9 is a plan of a friction dlSl; l l Denomination keys l, mounted upon le. vers 2, are operated lo elevate rods 3 formed, at their upper 'ends with denomina-ion stops 4, to bring said stops into the path of s. col umn stop 5 mounted upon a bar (l, the latter secured upon carriage, a p 'tion 'oit' which is seen at T. Each denomination stop-rod ,3 is formed with a shoulder 8 lo engage n universal arm' i), which is fixed upon and projects-hack irom a rock shaft 10. Said rrock shaft also carriers a forwardly directed. arm 11;' and the latter is connected by an opstanding link 12 with :1 lever 1?, pivoted at 14 upon the framework. and carrying an anti-friction rol-l l5. which lift-s a ruck 16 ouhof mesh with au esczipcment pinion 1T. Depression of the key '1 then-:fore lifts the stop i up into the path oi' Iho stop 5 to :11rrest the carriage, and al1 the same time releases the carriage, so that it muy rim freely under the tension of the usual spring barrel 1S, which connected llo the carriage by n strap 19.-

Permanei'itly in mesh with a `gear 20, upon said spring barrel, is n pinion 2l, which .usuuilv revolves idli' durino' the lo und fro movements of the carriage. Upon a shaft 22, which carries said pinion, is fixed one member Q3 of :L clutch. rlhc shut( is pirolod in :i cap Q4 which closes u box or bin-rol 25': containing the braking dmices; und the clutch 23 is arranged within the box :uid ultached' to the lower end ot' smid sluill, :it (he iop of the box. 'lho other member )U ot' said clutch, is lixed upon e disk lierelrv it controlled through the key-operated rockl'I-shaft l0. A compression spring' 2S, coiled about u spindle 29 mouulod iu lhe lower end oil the box aud iu liu(` will. die shaft. 2Q, tends constantly lo liti the clutch member 26 into mesh with lhe. companion clutch member LW); bul this tendency is opposed b liu-:ins ot' u linger il() lixcd upon Ithe end of the rook sliu'i' lll :aud caused conloo stantly, by a sprin 31, to hold said disk 27 down, and thereby oep said clutch members out of engagement. t will be understood VMhowever, that when the key 1 is operated and 5 the arm 9 caused to rock the shaft'lO, said finger 30 is lifted from the disk 27, and the spring 28 is permitted to lift the clutch member 26 into mesh with the clutch member 23, thereby causing the spindle 29 to be revolved by the pinion 21, as the carriage travels.

Upon the lower portion of the spindle 29 is fixed a cross-arm 32, having slotted ends in which Work arms 33 carrying weights 34; said arms being pivoted at 35 to the ends of the cross-arm, and extending through openings 33 in the disk 27, and the weights being placed so as to cause the arms normally to tend towards each other.

The cross-arm 32, when it starts to revolve,

V`-21j-.engages one or both of pointed pins 36 projecting out from a metal disk 37, which is loose upon the spindle 29l and 'whlch rubs upon a fabric or other friction disk 38, the latter rubbing or resting upon the oottom of the box 25. The weighted arms 33 are formed at thei lower ends with shoulders 39, which, when the weights 34 swing outwardly by reason of centrifugal force, bear down the disk 37 ac with great force against the disk 38, thereby creating sufficient friction to retard the revolution of the pinion 21, and hence of the spring-barrel 18, thereby reducing or controlling the speed ot' the-carriage 7.

low to slide up and down upon a hub 40 provided upon the cross-arm 32; and the spring 2S may be confined within the member 26, and work between said hub andthe top of 4o said member 2G. The latter may be splined to the spindle 29 in any suitableway, as for instance by Cutting away one side o the upper portion of spindle 29 to form a flat 41, Fig. 2, and forming in the top of the member 2b a hole having corresponding shape, to

fit loosely upon the shaft so that said mem.- ber may slide up and down.

lt will be understood that the rock-shaft 10 may continue in motion, if need be, after the full engagement of the clutch members 23, 26, to permit the completion of the' movement of the key l; and in fact the brake may be operatively connected to the carriage before the latter is released from its escapement mechanism.

The boX may be provided with a large opening 42, to give access to the parts therein; and said opening may'be covered by a closure 43. The barrel 25 may have a boss 44 bored to fit upon a fixed part 45 suitably fixed upon the framework of the machine; and a set-screw 46 may retain the same.

y Having thus described my invention, v aim:

1. ln a typewriting and tahulating'mechrihe clut'ch memberv 26 may be made holceases a pinion permanently connected to the carriage to rotate during the carria e travel, a. rotary braking device, two clut'c ing members between the braking device andv the pinion, a spring tensioned to cause said clutching members to connect, a master spring holding said members apart, and means controlled by said key to release the clutch spring from the control of said master spring. f

3. In a typewriting and tabulating mechanism, the combination with a carria e, a carriage feeding mechanism anda tabu a-tor key having means to release the carriage, of

a pinion permanently connected to thev carriage to rotate during the carria travel, a clutch member connected to sai pinion,a second clutch member, a spring tendin to connect said clutch member's, a rock s aft having a master spring, and having means rendered effective by saidmaster sprin to hold'the second clutch member away om the rst, a revoluble braking device connected to the second clutch member, and means for enabling said key to turn said rock-shaft to relieve the clutch spring from the opposition of the master spring.

V4. In a typewriting and tabulating mech-- anism, the combination withv a carria e, a carriage feeding mechanism and a tabu ator key having means to release the carriage, of a pinion permanentlygconnected to the carriage to rotate during the carriage travel, a clutch member secured to said pinion, an independently mounted spindle concentric with the pinion, a second clutch member' upon said spindle, a spring tensioned to move the second clutch member into engagement with the first,V a diei; carried by the second clutch member, a rock shaft having means to engage said disk and caused by a master spring to hold the second clutch member away from the rst, vmeans for enabling said key to turn said rock shaft in opposition to said master spring, and a braking device carried by said clutch spindle.

l 5. The combination with a power-driven carriage and an escapement mechanism there for, of a pinion permanently in mesh with l. gear which is connected to the carriage, n, shaft for said pinion, a clutch-member u said shaft, a cooperating clutch mem the clutch members,

Splined to a Spindle and connected to a disk, ay compre/Selen sprmg celled about the Splmle to move the second clutch member mto mesh .with the rsf, a spring-actuated membel` engaging Said disk to prevent Such meshing nii' L key1 having means to l'elenSe the Cnlriage, and also* having' meansy to release the Second clutch-member, and braking' devices te which the Second clutch member is operatively connected.

' EMIL L. PFUNDER.

V messes:

V. M. BYORKMAN, L. l normn'nm. 

